JPS63123747U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal sectional view of a carburetor and a valve opening regulating mechanism showing an embodiment of the present invention;
FIGS. 2A and 2B are characteristic diagrams of the yoke valve opening regulating structure in different states. 25...Diaphragm, 26a, 26b...Chamber, 27...Spring, 20...Regulation valve,
21... Manifold negative pressure path, 22... Thermo valve, 23... Water temperature control path, 28... Stopper rod.

Claims (1)

[Scope of utility model registration request] In a carburetor equipped with a choke valve, a regulating valve is divided into two chambers by a diaphragm, one of which houses a spring that elastically biases the diaphragm, and a regulating valve that communicates with the spring accommodation chamber of the regulating valve has a negative A manifold negative pressure path forming a pressure chamber, a thermovalve that detects the temperature of engine cooling water and closes when the temperature is below the set temperature and opens to the atmosphere when the temperature is above the set temperature, and this thermovalve and the negative pressure chamber of the regulation valve mentioned above. The water temperature control path communicates with the diaphragm of the regulating valve, and when the temperature of the engine cooling water is below the set water temperature of the thermovalve, negative pressure is applied from the manifold negative pressure path to the diaphragm against the elastic force of the spring. A structure for regulating the opening of a choke valve for a carburetor, comprising a stopper rod that comes into contact with the choke valve to restrict opening when deformed.